Time-modulated arrays with Haar wavelets
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866911768425529344 |
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| author | Maneiro-Catoira, R. Brégains, J. García-Naya, José A. Castedo, L. |
| author_facet | Maneiro-Catoira, R. Brégains, J. García-Naya, José A. Castedo, L. |
| contents | Time-modulated arrays (TMAs) can effectively perform beamsteering over the first positive harmonic pattern by applying progressively delayed versions of stair-step approximations of a sine waveform to the antenna excitations. In this letter, we consider synthesizing such stair-step sine approximations by means of Haar wavelets. Haar functions constitute a complete orthonormal set of rectangular waveforms, which have the ability to represent a given function with a high degree of accuracy using few constituent terms. Hence, when they are applied to the TMA synthesis, employing single-pole double-throw switches, such a feature leads to an excellent rejection level of the undesired harmonics as well as a bandwidth greater than that supported by conventional TMAs with on-off switches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17950 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Time-modulated arrays with Haar wavelets Maneiro-Catoira, R. Brégains, J. García-Naya, José A. Castedo, L. Signal Processing Time-modulated arrays (TMAs) can effectively perform beamsteering over the first positive harmonic pattern by applying progressively delayed versions of stair-step approximations of a sine waveform to the antenna excitations. In this letter, we consider synthesizing such stair-step sine approximations by means of Haar wavelets. Haar functions constitute a complete orthonormal set of rectangular waveforms, which have the ability to represent a given function with a high degree of accuracy using few constituent terms. Hence, when they are applied to the TMA synthesis, employing single-pole double-throw switches, such a feature leads to an excellent rejection level of the undesired harmonics as well as a bandwidth greater than that supported by conventional TMAs with on-off switches. |
| title | Time-modulated arrays with Haar wavelets |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2401.17950 |